Exact propagators in harmonic superspace

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Abstract

Within the background field formulation in harmonic superspace for quantum N = 2 super-Yang-Mills theories, the propagators of the matter, gauge and ghost superfields possess a complicated dependence on the SU(2) harmonic variables via the background vector multiplet. This dependence is shown to simplify drastically in the case of an on-shell vector multiplet. For a covariantly constant background vector multiplet, we exactly compute all the propagators. In conjunction with the covariant multi-loop scheme developed in hep-th/0302205, these results provide an efficient (manifestly N = 2 supersymmetric) technical setup for computing multi-loop quantum corrections to effective actions in N = 2 supersymmetric gauge theories, including the N = 4 super-Yang-Mills theory. (C) 2004 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)163-170
JournalPhysics Letters B
Volume600
Issue number1-2
DOIs
Publication statusPublished - 2004

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